CVE-2024-49915: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw This commit addresses a potential null pointer dereference issue in the `dcn32_init_hw` function. The issue could occur when `dc->clk_mgr` is null. The fix adds a check to ensure `dc->clk_mgr` is not null before accessing its functions. This prevents a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn32/dcn32_hwseq.c:961 dcn32_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 782)

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 6.10.14
linux	linux_kernel	6.11 — 6.11.3

References

Advisories & Patches

https://git.kernel.org/stable/c/7d1854c86d02cea8f8a0c0ca05f4ab14292baf3d https://git.kernel.org/stable/c/c395fd47d1565bd67671f45cca281b3acc2c31ef https://git.kernel.org/stable/c/f0454b3cb0584a6bf275aeb49be61a760fd546a2

Other References

https://git.kernel.org/stable/c/0d94d9cbd9fec7344d230c4f7b781826f7799c60 https://git.kernel.org/stable/c/ec1be3c527b4a5fc85bcc1b0be7cec08bf60c796 https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Frequently Asked Questions

What is CVE-2024-49915? +

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw This commit addresses a potential null pointer dereference issue in the `dcn32_init_hw` function. The issue could occur when `dc->clk_mgr` is null. The fix adds a check to ensure `dc->clk_mgr` is not null before accessing its functions. This prevents a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn32/dcn32_hwseq.c:961 dcn32_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 782) It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-49915? +

CVE-2024-49915 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-49915? +

CVE-2024-49915 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-49915? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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